Su-27UBM-1 it's a standard similar to Su-30KN, with precision bombs and air-surface rockets (Kh-29T, Kh-29L, Kh-31A, Kh-31P, RVV-AE, KAB-500Kr and KAB-500L), unguided rockets (S-8) and improved radar. First public appearance at MILEX-2005 in summer of the year 2005 - aircraft numer 60. Modernized are only two-seater Su-27UB, probably five aircrafts, between 2004-2005.

Belarusian Su-27UBM-1, 2009. Camouflage on top is a little schematic.
Since summer of the year 2009 national flag on fins!

A great success for Baranovichi 558th Air Repair Plant was a modernization of ten Kazakh Sukhois, ended in June 2010, to improved standards Su-27M-2 and Su-27UBM-2. Aircrafts were equipped with Belarusian and Israeli systems and armed with precision weapons.

Contract for:

none, but:

Indian Su-30K

End of 2011: after years of rumours and denies, it's a fact: Indian 18 Su-30K (first batch 1997-1999, produced by IAPO, Irkutsk) were returned to Russia, then shifted to Belarus. They will be modernized to Su-30KN standard in 558th Air Repair Plant in Baranovichi, where successfull modernization of the Belarussian (Su-27UBM-1) and Kazakh (Su-27M-2 and SU-27UBM-2) Sukhois was realized. Each aircraft is worth USD 10 mln, upgrade USD 5 mln. Maybe they stay in Belarus or will be sell to third countries (in 2017 12 aircrafts are bought by Angola).

In 2012 aircrafts were overhauled in Baranovichi 558th Air Repair Plant, Sukhois almost for sure will be modernized.

*Crashed in 1996, pilot Uladzhimir Karvat is dead.
** One and only aircraft in unusual green-brown camouflage, probably for foreign customer (about 2000). When sale was not realized, aircraft was repainted in lightgrey.
*** August 30th 2009, during air show in Radom (Poland) Su-27UBM-1 #63 crashed. Pilots are dead: Alexander Marfitsky (Марфицкий), deputy head of the Western Operational and Tactical Command of the Air and Air Defence Force, and Colonel Alexander Zhuravlyevich (Журавлевич), deputy commander of the 61st Fighter Air Base in Baranovichi.